PF30 to Extended BB30 (92mm Axle) Classic Bottom Bracket

(16 customer reviews)

£155.00

This bottom bracket is designed to interface a 30mm Extended BB30 Axle Crankset (MINIMUM 92mm axle length) with a bike frame that uses a PF30 Bottom Bracket (46mm Nominal Inside Diameter X 68mm Wide).

1 in stock

SKU: PF30-Extended BB30 (92mm Axle)-Classic Category:

Description

This bottom bracket is designed to interface a 30mm Extended BB30 Axle Crankset (MINIMUM 92mm axle length) with a bike frame that uses a PF30 Bottom Bracket (46mm Nominal Inside Diameter X 68mm Wide).

  • 6061 Aluminium Alloy (Most corrosion resistant aluminium alloy available)
  • Polished aluminium finish
  • Aerospace tolerances, guarantee a no slop fit with good retention
  • One Piece design is inherently creak free
  • Bearings from NTN, NSK, SKF, Koyo or FAG/INA
  • No Hammers to install or remove
  • Fully serviceable Design, the bearings are designed to be replaced quickly and easily
  • 1 year warranty on the bottom bracket body
  • Supplied with fitting adaptors, a press or studbar in M12 size will be required
  • All Hambini one piece bottom brackets require obstruction free access to your bottom bracket shell Click Here for Bike Specific Application guide

Hambini Bottom Brackets are amongst the lowest friction bottom brackets in the world. They are used by recreational cyclists, road racers, triathletes and time trialists from around the globe. They are of proven design and are manufactured to Aerospace tolerances using Aerospace materials by an Aerospace Engineer.

These units are of a one piece construction which makes them inherently resistant to creak, they will maintain perfect bearing alignment and function under loads in excess of 4000W.

All Hambini bottom brackets can be installed and removed with a conventional bearing press, they use a controlled method of installation using the recommended fitting adaptors, they require no hammers or specialized tooling for removal. Additionally, the wearing component – the bearings – can be removed and serviced in situ. Essentially the bottom bracket has been designed to be fully rebuildable

Please click on the reviews to get more opinions

Spin Test

Spin tests are not good measures of friction as the bearings are unloaded but this video highlights the benefit of good bearing alignment on friction and bearing life. This particular bottom bracket had completed 10,000km.

Comparative Friction

The graphs below show how Hambini bottom brackets perform in comparison to the bottom brackets of other manufacturers

The test conditions model real world cycling and more importantly mimics realistic frame tolerances. All of these tests have been conducted with an eccentricity of 0.1mm which is generally the maximum permitted in frame specifications – the reality is tolerances have been known to be much worse than this.

Misalignment is more critical to friction than the type of bearing ball material, a slight misalignment can easily outweigh the difference between a top of the range NTN bearing and a mediocre ebay no name bearing. The results show that bottom brackets which have an element of structural linkage between the drive and non-drive sides (one piece/threaded etc) perform much better than those which are multi piece.

Average Power Consumption - Hambini, CeramicSpeed, Kogel, Praxis

The high torque and low RPM of pedalling causes high Hertzian contact stressing on bearing surfaces which cause friction levels to change over time. Those bottom brackets which have used ceramic bearings, start off with fairly low levels of friction but over time their friction increases dramatically. The super hard ceramic balls grind a track into the comparatively soft bearing races causing friction to increase. This would be analogous to trying to drive a locomotive train on a road, the wheels would cut grooves into the road surface due to the huge difference in surface hardness.

A Hambini BB is a one piece bottom bracket. It actively contributes to the stiffness of the bike’s pedalling platform. Threaded and multi piece bottom brackets have an element of play in their design so they do not contribute anywhere near a comparative level of stiffness. Reviewers of Hambini BB’s often comment on their feeling of improved stiffness, this is due to them being one piece and undergoing a proprietary heat treatment process. This makes them stronger and stiffer. This is a difference the end user cannot see – but they can feel.

Bottom Bracket Stiffness Comparison Hambini, CeramicSpeed, Kogel, Praxis

Installation

For installation, you will require a bottom bracket press or a piece of M12 studbar and some nuts. A video showing the method of installation is linked below, the picture and text installation guide is available here

Removal

For removal, you will require a bottom bracket press or a piece of M12 studbar and some nuts. A video showing the method of removal is linked below

Service

Hambini Bottom brackets are designed so you can service the wearing component (the bearings) quickly and easily. The bottom bracket service procedure is shown below

Design Process

The process through which Hambini Bottom Brackets are designed is shown in the video below


Frequently Asked Questions

I have rounded up some of the most frequently asked questions that I get asked and put them in the list below

Q. Why are Hambini Bottom Brackets more expensive than everybody else?

A. Hambini Bottom Brackets are made in the UK where costs are considerably higher than the far east. Additionally as a private individual, I do not have the economies of scale that contract manufacturing companies are able to obtain.

Q. What is the difference between a Hambini Bottom Bracket and a mass market bottom bracket?

A. From a technical perspective, mass market bottom brackets are made to poorer tolerances and are therefore more likely to creak or result in poor bearing life. They are also designed to look aesthetically pleasing but compromise on areas which you cannot see (such as the fits, bearings and heat treatement). Hambini Bottom brackets are completely machined as opposed to moulded (Shimano/SRAM/Plastic). The Hambini Bottom Bracket tolerances are typically 10x tighter than Shimano/SRAM/Rotor/RaceFace/Token. Mass market bottom brackets often use poor quality bearings from the far east to maximise their margin. As an example, the bearings on Hambini Bottom Brackets (which are typically NTN) cost more than an entire bottom bracket from RaceFace/Token/SRAM.

Q. Why don’t you use Ceramic Bearings?

A. I have found ceramic bearings to have poor performance in bicycle applications. The ceramic bearings are not 100% ceramic, they are hybrid. A Hybrid bearing consists of ceramic balls sandwiched between a steel innner and outer race. The ceramic balls have a tendency to cut a groove into the steel and this results in poorer performance after only a few 100km. The majority of friction (>80%) in a bearing comes from the seal, grease and cage type. The ceramic balls make up a small fraction of the friction and have the negative effect of rapid bearing degradation. These are the main reasons I do not supply bottom brackets with ceramic bearings

Q. What is the difference between the Racing editions and the standard units?

A. The Racing Bottom brackets are made with superior materials, they are stiffer and slightly lighter. Racing bottom brackets are equipped wih low friction bearings. Racing bottom brackets have approximately 20 percent less friction than Classic units. The total friction is very small and would be difficult to notice when riding but nonetheless there is a measurable difference

Q. How long will the bearings last?

A. I cannot place a life on the bearings as life is largely dictated by the conditions they are subjected to. Having high loadings will increase their rate of wear as will riding in wet conditions. The bearings in all Hambini Bottom brackets are branded and meet minimum ISO standards so they are the best that are commercially available. Typical usage will be somewhere in the region of 2000km to 10,000km. As an example, those who watch my youtube channel will know my fastidious maintenance schedule which consists of weekly jet washing – I change the bearings twice a year, ie 8000km between changes. Due to the low speeds involved keeping them clean is more important than keeping them greased.

Additional information

Crankset Type

Extended BB30 (92mm Axle)

Frame

PF30

16 reviews for PF30 to Extended BB30 (92mm Axle) Classic Bottom Bracket

  1. Matt Rixon

    Similar to the BBinfiite design but costs two thirds less. Well made, machining quality is excellent and the bearings spin very freely. Clearly not a mass produced product. Very fast delivery. It’s not clear in the description, this comes with everything you need to install it apart from the press

  2. Steve Jones

    Customer Service is extremely good, speedy responses and accurate technical information. Final product is stunning. It functions as well as it looks. It is expensive but ride on it and you won’t go back.

  3. Jonny Come Lately

    This was suggested to me by a few people over at weight weenies Service was phenomenal. I had some queries when installing it, these were resolved within the hour and that was at 10pm at night! Out riding the difference is massive. The bike feels much stiffer, I thought the bike was stiff in the BB area before but after installing this, it’s a new level. I cried at the thought of spending $220 on a bottom bracket and wasn’t sure if buying one from the UK was a good idea. But I don’t regret buying this. It’s changed my riding from trying to adjust my pedal style to avoid creaking to going for it hell for leather. I wish I had discovered it sooner.

  4. Jordan Schumer

    It’s expensive but very well made. Comes in a crappy box but it is well packed. Fitting was easy and done in 15 minutes. I recommend watching the video beforehand. On the bike it’s faultless.

  5. Jantu

    5000km in and no creaking, flexing or noise. Bearings still spin freely and are clearly good quality. I used to use ceramic bearings before, now i don’t bother Hambini customer support at every point was excellent. I would recommend you contact him before you buy anything. He will give you good guidance.

  6. JTP

    The engineering in this BB is first class. Other BB manufacturers need to take note of the “no nonsense” approach to marketing. it’s refreshing to see someone who uses hard theory. Hambini response to questions is first class. Responses are received very quickly and detailed. When you buy this bottom bracket, the bit you are buying that is priceless is the expertise. It makes the local bike shop look like amateurs. The quality of this item is exceptional. The box it comes in is functional and I’d rather not pay an extra £5 for a nice box. Installation was as per the videos. Make sure you take the spacer out of the drive side!!!

  7. Alan38

    You won’t realise how poor your own bottom bracket is until you use a Hambini one. The difference is like night and day. Impeccably made, first class customer service throughout. I was a bit dubious about buying a bottom bracket from here because it is not a well known brand but frankly I cannot speak highly enough of him. He knows his product inside out, very helpful, very quick to respond. Is happy to customize where appropriate. Top job

  8. KurtC

    This is very clever because the Hambini design moves the bearings very close to the crank arms which makes the BB feel stiff. It spins freely and does not creak. Hambini’s customer service is the best I have come across.

  9. Matty

    Hambini was very helpful from the beginning, his responses always very quick. Quality of the product is superb. Would I go for it again? Absolutely!

  10. Bryan H

    I cannot fault this item for quality, fit and finish. All of my creaking has gone and the pedalling quality is stiffer. Only gripe is it’s expensive.

  11. Jim Dale, Billings MT

    Hambini has made a world of difference to my riding. This bottom bracket is superb. Technical support was excellent and the item is beautiful. I love it. My only mistake was not buying it sooner.

  12. Hakim339

    No shiny box, no marketing, not even a manual… But I’d buy another one in a flash. Customer support is very good here, this bottom bracket is also very good. My LBS fitted it and the guy almost jizzed himself asking where it came from. The bike feels completely different now. I did a back to back test on two cannondales, mine with a hambini and another with wheels mfg. There is no contest. Hambini wins hands down. Very impressed, I just wish it was cheaper.

  13. Blairha73

    No creaking. No flexing, easy to install. Best £75 I spent on my bike. Well engineered, quality product but don’t expect flash packaging.

  14. SeatonRacer

    I wanted to buy the black one but it was out of stock, so I plumped for this. I’m very happy with the purchase, it looks really nice in the flesh. Stiff, well made. delight to touch.. It’s expensive though.

  15. Jimmy Casiraghi, NY

    I have not had much experience with suppliers from Europe. Hambini customer service is excellent. Attention to details and speed of response are out of this world. I would certainly recommend this company and would have no hesitation in buying again. The bottom bracket is bordering on art work.

  16. Ulf Hansen (verified owner)

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